Drive-chain.



- Be it known that I, FRANK L.

FRA K MORSE; F TRUMANSBURG, NEW .Yonmgitssrenonrononsn onnrni oola- PAN Y, OFTRIUMANSBURG,

Specification of Letters Patent.

NEW YORK, A CORPQ A OFNEW YORK:

DRIVE CH it; I 1. n r y:

i Application filed September 22, 1905. Serial Nbr,,2'i9,631.'

To dll whom concern:

citizen ,of "the'l-ilnited States residing in strength and durability of the chain by pro vidin the adjacent .ends of the plates of the .link with laterally thickened portions Truina-nsburg,"county 6f Tompkins,- State of New York have invented or discovered a certain new and usefulImprovement 1n Drive-Chains, of whlch improvement the following is a specification.

This Invention. relates to drivechains'for sprocket wheels and more particularly to that typeflofchain wherein the links are composed oftwo sidebars or plates joined .by' pintles at their ends. In chains of this type a roller hasheretofore been mounted 15- oneachpintleof the chain for engaging the sprocket teeth and dnninlshing fr ction, but

these rollers have been found objectionable for thereason that'the'y become loose after alittle Wear andalso become clogged with .dust and dirt when used in exposed places. .fQne ofthe objects of my invention is to overcome thisdifii culty and to increase the adapted to meet together and having sur- I faces forlen 'aging the sprocket teeth.

' .Anotherieature of my invention rel-ates to improyed means for securing a part of the pintle in its position in the plates, and

comprises additional rivet pieces of soft metal which may; be readily upset or headed --over. to hold-the -parts in position or cut away when it is de'siredto remove the hardene'dpa'r-t of the pi'ntle; e

-Another important feature of my invention consists in providing soft metal rivet pieces for riveting" the links of the chain together, which obviates the necessity. for riveting the ends of thehardened part of the pintle for that purpose In the accompanying drawing Figure 1 is a plan riewof two links of a chain, constructed according to my invention, apart of one of the side plates of one link being broken away;'F1'g. 2 a side elevation of the same with a part of the pintle indicated in section; Fig. 3 and Fig. 3 a plan and end view respectively showing the parts of the pintle separated; Fig. 4 and Fig. 5 a plan and inside elevation of one of the plates of a link; Fig 6 a plan view of two links with a modified form of pintle shown in horizontal section; F ig. 7 a side elevation of the links shown in Fig. 6; Fig. 8 and Flg.

Morse, a

S" a plan and sectional view respectively showing the parts of; the'modifie'd form of Patented 3 521, 1912..

pintle separated; and Fig. 9. and Fig. 10 a plan and inside -felevation' of one-plate of the form of link shown in Fig. 6. v

Accnrdmgto the construction.shown the link is composed offtwo side plates 11 and.

12, each beingproyided at one end with alatera'lly llIlCkQIIQCl TOItlQII 13 extendingim wardly toward and "meeting against the.

other, the thickened end portions also extending" downward at I6-and having surfaces 14 for engaging the teeth ,of the M the two part type comprising a seatpin 1? and a rocker 18 adapted to turn or rock one upon the other as the chain passes on and 'oiftrom the sprocket wheel: The seat pin is preferably arranged to pass loosely through the opening 15in the thickened, ends'l3 of the platesand be rigidly secured in the-thin ends of the plate of the adjacent link, which may have substantially crescentshaped openings 19-t'or this purpose, while between the seat pin and the thickened ends of the plates. The partsofithe pintle which turn uponleach other are usually made of hardened steel, andfor. fastening. the. same pieces 20 of softer metal which may be insertedthrough the opening in the plate beside the hardened pin' and then headed over on the end thereby securing the pin in posi tion and holding the links of the chain together. Vith this construction, when it-is desired to remove or replace the pintle, the headed-over portion of the soft metal may be readily cut away with a tool and, the parts of the pintle easily driven out therebygreatlyfacil'itating the replacing of parts.

These wedge strips'may be made in any desired hape but'I prefer to form theseat the rocker pin is mounted in the opening 15 in the plates I providesmall strips or rivetpins with beveled corners and ends so that thewedge strips 20 may extend through the two plates the full length of theseat pin and be headed over .at both ends as this holds the pin firmly in place.

The side plates are preferably offset, as

at 21, so as to make all links alike and bring the outside ends thereof into the same plane, and the thickened ends of the .two plates of each link may be fastened together by rivets 22.

As shown in Fi s. 6 to 10 the chain is formed with a modified pintle comprising a cylindrical pin 23 and a bushing 24 the latter extending through the thickened ends of the two plates while the-pin passes through the bushing and the cylindrical'openings 25 in the thin ends of the .two plates of the adjacent link. The bushing may be flared sufficiently at its ends to hold the thickened ends of the plates securely together.

Itwill now be apparent that by means of my-iniprovement a very strong and durable form of chain is provided, the links having a solid end or head with properly formed surfaces for engaging the sprocket teeth, and

with no loose parts to become clogged with dirt and dust.

- It will be noted that the bearing surfaces 14 are arranged on both the inside and outside of the solid end portion of the link for engaing the teeth of the driving sprocket whee on one side and the teeth of the driven sprocket wheel'upon the other side, whereby only one end of the link plates makes en gagement with the sprockets.

' Having now described my invention, what a I claim as new-and desire to secure by Letters Patent is 1. A drive chain having a pintle and links formed of two'side plates provided with laterally thickened end portions surrounding the pintle and having downward extensions engaging the sprocket teeth:

2. A drive chain having links formed \of two laterally bentside plates, said plates having thick ends meeting together and pro? vided with downward extensions having surfaces for engaging the sprocket teeth, and a pintle passing. through said thickends of the plates.

3. A drive chain having links composed of two side .plates each provided with a lat erally thickened end and having a downward extension for engaging the sprocket teeth, and pintles formed-in-separate.p'arts adapted to turn one upon another, one part being carried by the thin ends and the other by the thickened ends of said plates.

4. drive chain having links composed of two slde plates each 'rovidedwitha laterally thickened end an% [aving a downward extension v for engaging the sprocket teeth,

and two-part pintles comprising seat pin and rocker' ad ted to turn one upon the other, theseatiflin being supported by the thin ends of the plates andthe rocker being carried by the thick ends. I

5. A drive chain consisting of links provided with downw d, extensions and hardened steel pintles ajd rivet pieccs of soft metal for fastening the pintles in place in the links.

6. A drive chain having links composed of a plurality of plates and pintles formed in separate parts adapted to turn one upon another, and rivet pieces of softer metal than the pintles forholding one of the parts thereof in position in the plates.

7. A drive chain. having links composed of two side plates, pintles formed in separate parts adapted to turn one upon another, and rivet ieces of softer metal than the pintle for astehing the ends of one of said parts in the two side plates.

8. A drive chain having links composed of two side plates with pintle openings in their ends, pintles formed in separate parts adapted to turn one upon another, one part extending through the openings in said plates,

and wedge strips of softer metalthan the 'intle also extending through said openings and adapted to be headed over .to fasten the part of the pintle in said plates.

9. A drive chain having links composed of two side plates provided with downward extensions for engaging the sprocket teeth,

hardened steel pintles for said links, and soft .metal rivets for securing the links of the chain together and the pintle in place in said links.

10. A drive chain having l1nks composed of side plates meeting together at one end,

andprovided with downward extensions at said end for engaging-the sprocket teeth, and pintles for jofining sald lmks.

In testimony whereof I have hereunto set my hand.

, FRANKL. MORSE.

lvitnesses I Y HowAnn W. RILEY,

ALFRED 13. Wear. 

